Wireguard can not access some sites

I am using Ubuntu 20.04 with x86_64 Linux 5.8.0-55-generic kernel. I use linuxserver/wireguard docker image as Wireguard server. This is my docker-compose.yml of wireguard docker:

---
version: "2.1"
services:
  wireguard:
    image: ghcr.io/linuxserver/wireguard
    container_name: wireguard
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    environment:
      - PUID=0
      - PGID=0
      - TZ=Europe/London
      - SERVERURL=<my-server-address>
      - SERVERPORT=51820
      - PEERS="ios,laptop,pc"
      - PEERDNS=8.8.8.8,8.8.4.4,2001:4860:4860:8888,2001:4860:4860:8844
      - INTERNAL_SUBNET=10.13.13.0 #optional
      - ALLOWEDIPS=0.0.0.0/0
    volumes:
      - /opt/wireguard-server/config:/config
      - /lib/modules:/lib/modules
    ports:
      - 51820:51820/udp
    sysctls:
      - net.ipv4.conf.all.src_valid_mark=1
      - net.ipv6.conf.all.disable_ipv6=0
    restart: always

This is a config file I use:

[Interface]
Address = 10.13.13.3
PrivateKey = <private-key>
ListenPort = 51820
DNS = 8.8.8.8,8.8.4.4,2001:4860:4860:8888,2001:4860:4860:8844

[Peer]
PublicKey = <public-key>
Endpoint = <my-server-address>:51820
AllowedIPs = 0.0.0.0/0
PersistentKeepalive = 25

The config file works well but I can not reach some websites, like Kaggle, and I don't know why :( when I execute ping www.kaggle.com I get:

PING www.kaggle.com (35.244.233.98) 56(84) bytes of data.
64 bytes from 98.233.244.35.bc.googleusercontent.com (35.244.233.98): icmp_seq=1 ttl=116 time=112 ms
64 bytes from 98.233.244.35.bc.googleusercontent.com (35.244.233.98): icmp_seq=2 ttl=116 time=111 ms
64 bytes from 98.233.244.35.bc.googleusercontent.com (35.244.233.98): icmp_seq=3 ttl=116 time=111 ms
^C
--- www.kaggle.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 111.054/111.255/111.503/0.186 ms